I totally understand how you may feel uncomfortable around "his" friends. However, I think you really need to go places when he invites you. A big part of this in my male mind is you as a female staking your "claim" to him. Not by being jealous or possessive. Rather, just by being with him. This will speak volumes to the other females way beyond what any words can say. This could also be a small step for him to help rebuild trust.
Take Care,
NMD
"Chains do not hold a marriage together. It is threads, hundreds of tiny threads which sew people together through the years. That is what makes a marriage last --more than passion or even sex!" - Simone Signoret
